Bump Python versions, remove conditional imports

Mako 1.1 now supports Python versions:

* 2.7
* 3.4 and higher

This includes that setup.py no longer includes any conditionals, allowing
for a pure Python wheel build, however this is not necessarily part of the
Pypi release process as of yet.  The test suite also raises for Python
deprecation warnings.

Fixes: #249

Replaced usage of ``inspect.getfullargspec()`` with the vendored version
used by SQLAlchemy, Alembic to avoid future deprecation warnings.  Also
cleans up an additional version of the same function that's apparently
been floating around for some time.

Fixes: #295
Change-Id: I98274c16b6022289d1890f4daf532bab323ab112

1 files changed, 5 insertions, 20 deletions

diff --git a/setup.py b/setup.py
index 17b6c70..68b46ef 100644
--- a/setup.py
+++ b/setup.py
@@ -14,24 +14,9 @@ VERSION = (
 )
 v.close()
 
-readme = open(os.path.join(os.path.dirname(__file__), "README.rst")).read()
+readme = os.path.join(os.path.dirname(__file__), "README.rst")
 
-if sys.version_info < (2, 6):
-    raise Exception("Mako requires Python 2.6 or higher.")
-
-markupsafe_installs = (
-    sys.version_info >= (2, 6) and sys.version_info < (3, 0)
-) or sys.version_info >= (3, 3)
-
-install_requires = []
-
-if markupsafe_installs:
-    install_requires.append("MarkupSafe>=0.9.2")
-
-try:
-    import argparse  # noqa
-except ImportError:
-    install_requires.append("argparse")
+install_requires = ["MarkupSafe>=0.9.2"]
 
 
 class PyTest(TestCommand):
@@ -59,7 +44,8 @@ setup(
     version=VERSION,
     description="A super-fast templating language that borrows the \
  best ideas from the existing templating languages.",
-    long_description=readme,
+    long_description=open(readme).read(),
+    python_requires=">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*",
     classifiers=[
         "Development Status :: 5 - Production/Stable",
         "License :: OSI Approved :: MIT License",
@@ -77,14 +63,13 @@ setup(
     url="https://www.makotemplates.org/",
     project_urls={
         "Documentation": "https://docs.makotemplates.org",
-        "Issue Tracker": "https://github.com/sqlalchemy/mako"
+        "Issue Tracker": "https://github.com/sqlalchemy/mako",
     },
     license="MIT",
     packages=find_packages(".", exclude=["examples*", "test*"]),
     tests_require=["pytest", "mock"],
     cmdclass={"test": PyTest},
     zip_safe=False,
-    python_requires=">=2.6",
     install_requires=install_requires,
     extras_require={},
     entry_points="""